56. I found _______impossible for _______to work out the maths problem.
Jane, quickly get this film , I want to know if this camera works well.
A famous professor is coming to give us a lecture. Will you it?participate B. attend C. enter D. deliver
The traffic rule says young children under the age of four and ____ less than 40 pounds must be in a child safety seat.
Many buildings in the city need repairing, but the one ______first is the library.
The news shocked the public, _______to great concern about students’ safety at school.